Excessive Iteration Affecting pypdf package, versions [,6.15.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-PYTHON-PYPDF-18592370
- published8 Aug 2026
- disclosed7 Aug 2026
- credit7thParkk
Introduced: 7 Aug 2026
NewCVE-2026-71852 (opens in a new tab)How to fix?
Upgrade pypdf to version 6.15.0 or higher.
Overview
pypdf is an A pure-python PDF library capable of splitting, merging, cropping, and transforming PDF files
Affected versions of this package are vulnerable to Excessive Iteration in the parsing process of font width entries with unusually large values. An attacker can cause excessive resource consumption by crafting a PDF that triggers long runtimes and high memory usage during text extraction.
Workaround
This vulnerability can be mitigated by applying the changes from PR #3946.